initial commit

protocols/gamespy3.js

@@ -0,0 +1,101 @@
+module.exports = require('./core').extend({
+	init: function() {
+		this._super();
+		this.sessionId = 1;
+		this.encoding = 'latin1';
+		this.byteorder = 'be';
+	},
+	run: function() {
+		var self = this;
+
+		this.sendPacket(9,false,false,false,function(buffer) {
+			var reader = self.reader(buffer);
+			reader.skip(5);
+			var challenge = reader.string();
+
+			self.sendPacket(0,challenge,new Buffer([0,0,0,0]),true,function(buffer) {
+
+				var reader = self.reader(buffer);
+				var state = {
+					players:[]
+				};
+
+				while(!reader.done()) {
+					var key = reader.string();
+					if(!key) break;
+					var value = reader.string();
+					state[key] = value;
+				}
+				
+				var mode = '';
+				while(!reader.done()) {
+					var mode = reader.string();
+					reader.skip(1);
+					
+					while(!reader.done()) {
+						var item = reader.string();
+						if(!item) break;
+						
+						if(mode.substr(-1) == '_') {
+							// players
+							state.players.push({name:item})
+						}
+					}
+				}
+
+				self.finish(state);
+
+			});
+		});
+	},
+	sendPacket: function(type,challenge,payload,assemble,c) {
+		var self = this;
+
+		var challengeLength = challenge === false ? 0 : 4;
+		var payloadLength = payload ? payload.length : 0;
+
+		var b = new Buffer(7 + challengeLength + payloadLength);
+		b.writeUInt8(0xFE, 0);
+		b.writeUInt8(0xFD, 1);
+		b.writeUInt8(type, 2);
+		b.writeUInt32BE(this.sessionId, 3);
+		if(challengeLength) b.writeUInt32BE(challenge, 7);
+		if(payloadLength) payload.copy(b, 7+challengeLength);
+
+		var numPackets = 0;
+		var packets = {};
+		this.udpSend(b,function(buffer) {
+			var iType = buffer.readUInt8(0);
+			if(iType != type) return;
+			var iSessionId = buffer.readUInt32BE(1);
+			if(iSessionId != self.sessionId) return;
+
+			if(!assemble) {
+				c(buffer);
+				return true;
+			}
+
+			var id = buffer.readUInt16LE(14);
+			var last = (id & 0x80);
+			id = id & 0x7f;
+			if(last) numPackets = id+1;
+
+			packets[id] = buffer;
+
+			if(!numPackets || Object.keys(packets).length != numPackets) return;
+			
+			// assemble the parts
+			var list = [];
+			for(var i = 0; i < numPackets; i++) {
+				if(!(i in packets)) {
+					self.error('Missing packet #'+i);
+					return true;
+				}
+				list.push(packets[i].slice(16));
+			}
+			var assembled = Buffer.concat(list);
+			c(assembled);
+			return true;
+		});
+	}
+});